Originally Posted by LarsHP
Yes, you are right. If you use an external amp with low output impedance, then the issue is gone, but so is the small onebox idea as you say. That's why people choose to have the output resistors removed (mod the AK100).
The output impedance of the AK120 is officially 3 Ohms, but someone measured it to be 5 Ohms. Either way it is still not ideal, but much better than the AK100.
If I knew it in the earlier days I would have been bought it already but too late now, I am going to get either X5 or DX50, which both have less than 0.5 OI. Must be honest, I am leaning towards to FiiO in this comparison but I am only talking about specs, nobody has heard them yet anyway. After reading a some reviews I will decide.
Things attractive in X5 for me: double microsd slot, physical buttons instead of touchscreen (hate everything with touchscreen, including my galaxy s2 or idevices). Also, I am not sure but the dac chip they use is better I think, which is not something clear. What is better? Nobody can tell it all depends on the whole structure .Anyway it is incredibly early for me to decide. It is good that I didn't buy AK100 before.
I know the success of DX100 especially soundwise, so iBasso has my curiosity and attention. I will never go without considering DX50 seriously. I wish DX100 had a little longer battery and physical control buttons and without android, that would be my ultimate device. I really don't mind its size since an amp is really not necessary with it.
The japanese version of DX100 has longer battery I believe but it still doesn't solve the UI and all.